Trailing edge wedge?

Date:         30 Mar 99 01:54:01 
Organization: Deja News - The Leader in Internet Discussion
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In the latest issue of Av Week (8 March 99) there is an article on
Boeing's plans.  Included for the 747-400 is something called a
'trailing edge wedge'.  Apparently this would have given fuel savings
of 7% on the MD-11, and works even better on the 747.  "The trailing edge
wedge was great on the MD-11, but it is stunning on the 747".

It seems surprising there are still relatively easy 7% improvements laying
around.  Does anyone know what this wedge is, and the basic idea behind
it?  Why is it only being introduced now?

   -Lou Scheffer

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